Range Of Functions Of The Two Serial Interfaces; Overview Of The Functions Possible At Si1 And Si2 Interfaces - Siemens SIMATIC S5 Series Manual

S5-95U, Second Serial Interface
1.2

Range of Functions of the Two Serial Interfaces

You can connect programmers and operator panels at both serial interfaces.
The entire range of functions of the interfaces is listed in Table 1-3. The program execution period
may be extended when connecting a programmer, operator panel or SINEC L1 to the SI1 or SI2
interface (for scan on-load times of the PLC, see Appendix E).
Note
If a function is not parameterized in DB1, the driver number "00
written in the system data during startup of the PLC ( Appendix B, system data word
46); i.e. you can operate a programmer or operator panel at the SI2 interface
immediately after the restart of the PLC.
Table 1-3
Programmer Function
Designation
Input block
Output block
Test
Program test
END program test
Signal status display
PLC functions
PLC restart
PLC STOP
Compress
STATUS variable
Force
Force variable
PLC information
Output addresses
Memory configuration
System parameter
Block stack
Interrupt stack
EWA 4NEB 812 6095-02

Overview of the Functions Possible at SI1 and SI2 interfaces

Abbreviation
INPUT
OUTPUT
TEST
PROG TEST
END TEST
STATUS
PC FCT
START
STOP
COMPRESS
STAT VAR
FORCE
FORCE VAR
PC INFO
OUTP ADDR
MEM CONF
SYSPAR
BSTACK
ISTACK
Description of the System
Possible at SI1
X
X
-
-
X
X
X
X
X
-
X
X
X
X
X
X
" is automatically
H
Possible at SI2
X
X
-
-
-
X
X
X
X
-
X
X
-
X
-
X
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